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Finding the Fourth Proportional to 287,801.02, 431,740.88 and 98,210.40

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Solution

The fourth proportional to 287,801.02, 431,740.88 and 98,210.40 is: 147,329.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,801.02 : 431,740.88 = 98,210.40 : x
  2. Step 2: Convert to fraction form
    287,801.02/431,740.88 = 98,210.40/x
  3. Step 3: Cross multiply
    287,801.02x = 431,740.88 × 98,210.40
  4. Step 4: Simplify right side
    287,801.02x = 42,401,444,521.15
  5. Step 5: Solve for x
    x = 42,401,444,521.15/287,801.02
  6. Step 6: Final answer
    x = 147,329.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.